Tramming locomotive



Nov. 21, 1950 A. L. LEE

TRAMMING LOCOMOTIVE Filed July 21, 1945 5 Sheets-Sheet 1 Film.

Y INVENTOR, ARTHUR L. LEE,

AT 'Y Nov. 21, 1950 A. L. LEE 2,530,472

. TRAMMING LOCOMOTIVE Filed July 21, 1945 5 Sheets-Sheet 2 yv /m ATTYNov. 21, 1950 A. LEE

TRAMMING LOCOMOTIVE 5 Sheets-Sheet 3 Filed July 21. 1945 I I l I I I l Il 1 l I I l I I I l I I l l l I I I ll..+

INVENTOR, ARTHUR L. LEE,

Nov. 21, 1950 A. L. LEE 2,530,472

TRAMMING LOCOMOTIVE V Filed July 21, 1945 I 5 Sheets-Sheet 4 84 55 Q IOQi 45! 1 IN VEN TOR, ARTHUR L. LEE,

Patented Nov. 21, 1950 TRAMMING LOCOMOTIVE Arthur L. Lee, UpperArlington, Ohio, assignor,

by mcsne assignments, to The Jeffrey Manufacturing Company, acorporation of Ohio Application July 21, 1945, Serial No. 606,327

15 Claims.

This invention relates to a tramming locomotive and an object thereof isto provide such a locomotive in which the overall length may be readilyadjusted by improved means so that the locomotive may be received on anelevating hoist.

Anothe object of the invention is to provide an improved locomotive witha front or operators platform which may be reciprocated or movedrectilinearly to reduce the length of the locomotive to a minimum fortransportation on a hoist.

A further object of the invention is to provide a locomotive withflexible control means which may be moved out of the way when theoperators platform is adjusted to a collapsed position to reduce theoverall length of the vehicle to a minimum.

Other objects of the invention will appear hereinafter, the novelfeatures and combinations being-set forth in the appended claims.

In the accompanying drawings,

Fig. 1 is a perspective view of a tramming locomotive incorporating thefeatures of my invention;

Fig. 2'is a side view of the locomotive with the operators' platform inits collapsed position, showing the locomotive carried on a hoist;

Fig. 3 is a detailed view of a portion of the brake operating mechanismof the locomotive, with manyparts omitted in the interest of clearness;

detail of the brake mechanism;

Fig. 5 is a plan view of the locomotive, with parts omitted;

Fig. 6 is a sectional view taken through the line 6-6 of Fig. 5, lookingin the direction of the arrows; v

Fig. 7 is a sectional view taken through the line of Fig. 5, looking inthe direction of the arrows.

Fig. 8 is a sectional elevational view through the locomotive, with thebattery box removed and certain parts omitted, showing particularly thedrive mechanism therefor;

Fig. 9 is a sectional plan view showing a bearing and shaft mounting;

Fig. 10 is an elevational view showing a mounting of one of the bearingboxes;

Fig. 11 is a sectional elevational View through the front axle of thelocomotive; and

Fig. 12 is a similar view through the rear axle thereof.

The elongatable locomotive includes a main frame which is formed of apair of laterally spaced longitudinally extending right angle main Fig.4 is a combined sectional and plan view of a frame side members 2| and22 (see Figs. 11 and 12). At their rear ends the side members 2| and 22are rigidly connected together by a heavy cross-piece 23 (see Figs. 5and 8) which forms the rear bumper and coupling member of thelocomotive. At their bottoms and adjacent their forward and rearwardends the side members 2| and 22 are also connected by cross-plates 24and 25, respectively.

Positioned above and rigidly attached to the outwardly extendinghorizontal plate portions or flanges of the main frame side members 2|and 22 are Z-shaped main frame aprons 26 and 21, the former beingattached to main frame member 2| and the latter to main frame member 22(see Figs. 11 and 12) to form spaced side members of the locomotive mainframe. The bottom portions or flanges of each of the Z-shaped aprons 26and 21 extend in the same direction as and are spaced above theoutwardly extending flange portions of the main frame members 2| and 22,respectively, to form a pair of ways one of which extends longitudinallyalong each side of the main frame. All of the main frame members abovedescribed are rigidly attached together, as

by welding, and constitute the principal elements of the locomotive mainframe.

Also adjacent the front or ,operators end of the machine and at the topthereof there is a transversely extending Z-shaped plate or apron 28(see Figs. 1 and 8) which forms a support or dashboard upon which acontroller 29 and other instruments and adjuncts are supported. Thisapron or plate 28 is rigidly attached to the main frame members 26 and21 and forms a portion of the main frame 20.

The main frame 2|) of the vehicle also constitutes a truck frame and itis supported upon four flanged traction wheels, pairs of which aredesignated 30 and 3|, respectively. Flanged wheels 30 and 3| are adaptedto run along the rails 32 of ,a mine track, asclearly illustrated inFig. 1 of the drawings.

Asbest seen in Figs. 11 and 12 of the drawings, the front wheels 30 aremounted on and keyed to a common shaft or front axle 33, and the rearwheels 31 are similarly mounted on and keyed to a shaft or rear axle 34.The wheels 30 and 3| are mounted for axial adjustment so as to bereceivable on rails of different gauge.

The mounting of the axles 33 and 34 and the manner in which they aredriven constitute important features of my invention and are disclosedand claimed in my co-pending application, Serial No. 707,587, filedNovember 4, 1946, for a Tramming Locomotive. Shaft 33, for example, ismounted in a pair of spaced anti-friction bearings 35 and 33, whichbearings are mounted on the main frame 29 and held thereto against anymovement relative to said main frame. To this end, bearing 35 is carriedin a heavy removable bearing receiving plate 31 which is bolted to aheavy ring 33 which is welded to the main frame member 2|. Bearing 36'is likewise rigidly attached to the main frame member 22 by virtue of anenclosing tube 39 for the shaft 33 which is welded to the main framemember 22 and thus constitutes a portion of the main frame, the lefthandend (as viewed in Fig. 1 1'.) of said tube 39' being rigidly attached toa chain and sprocket drive gearing casing 48 which is rigidly attachedto the ring 38, as by Welding.

As best illustrated in Fig. 8 of the drawings,

the casing 48 extends longitudinally along one side of the main frame,and adjacent the main frame sidemember 215 and apron 26. and isprovidedwith. a removable cover plate 4| so that the. drive gearing. may! behoused in a bath of lubrica-ting: oil. which will also: lubricate thebearings 355 and 36. as well as a-bearing for the shaft 34;

The; bearings. 35 and 36: are provided with oil or'grease seals 42 and.43, respectively, which retain the lubricating oil within the-casing 40and shafttube-39f It; is to. be particularly'noted that the shaft 33and: the wheels:3|l aremounted for rotation with respect to. the mainframe 23; but they are held against up and: down. or any other. radialor rectilinear movementwith respectto said main frame. As a consequence,as. the wheels 30 roll over an uneven; track, the main. frame 20 will becausedto follow this unevenness. Furthermore, there is no; springmounting whatever between the shaft 33 and the. main frame 20 of thelocomotive or vehicle;

Theshait-34; whichisnear therear end of the vehicle; is. mountedon..a.pa-irof spaced bearings 44- andi45. BearingALwhichis preferably adouble, antiefrictionc roller bearing, has'its' outer race mountedein.31L cageor. casing- 46. (see Figs. 9' and 12) which is held against.radial or other movementv withzrespect.to theemain frame 20 byvirtueofthezfactzthat itliS receivedin' a cylindricalring- 4-!carriedzby. a minor housing 48 rigidly at-- tached 13032115uprightplateofthe drive casing 46. The outer surface of the cage orcasing 46- forms a.segment ofa sphere and thus-presentsa segmentalsphericalLbearing surface having'a rolling: bearing. contact with theinner cylindrical surface of the receiving ring 41-.

As; clearlyiillustrated in: Fig. 9 of the drawings,

a; pair of-diametrically positioned pivot pins 49"provid'ea:trunnion-mounting-for the cage 46,- the axis of; which. issubstantially horizontal and at right anglesito the axis of theshaft34-. The trunnion. or. pivot pins 49. are removably held in place inintegral portions of the cup 48 by set screws;ll.. An oil.seal:5l isalso provided between thegshaft 34: and the super housing-l8.

The. bearing: parts thus described provide a complete bearingassembly 52whichprovides for" pivotalimovementiof the shaft 34 in a verticalplanepassing; throughits axis. This, ofcourse, provides alimitedamountof up and-down movementof. the left-handrear wheel 3|; asviewed in Fig,12 of thedrawings, anda greater amount of. movement of: the right-handwheel 3|, as viewed in-said,Fig;. 12, to the endthatallfourofthetraction wheels 30 and 3| may remain on.

the track rails 32 at all times, irrespective of the unevenness of saidrails.

To provide for the up and down movement particularly of the right-handwheel 3|, as viewed in Fig. 12, the bearing 45 is mounted in a box 53(see Figs. 10 and 12) said box 53 being substantially square and beingguided in a rectangular frame 54 formed in the side member 22 whichprovides for a reasonable amount of up and down movement of the box 53without any appreciable forward and rearward movement thereof. At itsbottom. the box 53 is rigidly attached, as by machine screws, to anangle spring support 55 which extends forwardly and rearwardly thereofand which. is provided with forward and rearward bosses which receivecoil springs 56, the upper ends of which are received in bosses carriedby brackets 5'! rigidly attached to the plate 22.

It is thus evident that I have provided a threepoint type of suspensionfor the main frame 2|] which: involves only a single spring'mountedhearing, namely, the bearin 45;: theotherbearirig'fl" which supportsshaft 34 providing for pivotal' up and down movement of said shaft 34"while holding it against radical or rectilinear movement; The bearingsfortheshaft 3 3, of course; as above mentioned, hold the axis of saidshaft in fixed relation to themain: frame 20 andiprovi'de only rotationof said shafton a fixed axis-with respect to said main frame.

The two: shafts 33 and 34 aredriven from an electric motor 58- (see Fig.5') which may, forex-- ample, be. a direct current motor and whichisunder" the control ofcontroller 29. Motor 58 is connected to andsupported by a; cross piece 59 forming part of the main frame andrigidly attached at opposite ends'to the-framemembersfl and'22;

The armature shaft ofi themoto'r 58 drives atransmission 88 including abevel gear which drives a master ring gear 62 (see Fig. 11).- Gear 62.is mounted. ona shaft 63 mounted in spaced anti-friction bearingscarried by the housing or casing of transmission cc. Shaft 63 projectsfrom said transmission casing on: one side and is provided: with a drivesprocket 64 whichdrives asingle endless roller chain 65 which mesheswith and: drives a pair of. drive sprockets- 66 and 61- keyed: to theshaftsv 33 and: 34, respectively. The three sprockets 64, 66 and 61 andthe chain-65 areall containedtwithirr the previously described casing40, 4|.

A slack taker-up mechanism 68 is provided in association with the lowerrun of the endless chainlfii'nwhichimay bereadily adjusted from apositionioutside the casing 40; 4|

From the above description of the drive" gearing for the vehicle or"locomotive anumber' of character istics areobvious.- First of all, it istobe noted that all four of the wheels 36 and 3| and respect to saidmain framelllt Furthermore; the axiszof the sprocket:M ami-shaft err-ispreferably substantially directly above the axis'of the shaft 33 and it,of course, is fixed with respect to the main frame 20 and with respect.to the axis of said shaft 33. s

It is obvious that up and down movement of the axis of shaft 34 will notmaterially affect the overall length of the chain 65, while up and downmovement of shaft 33 would adversely affect it or, in other words, wouldadversely affect the tension on said chain. Therefore, the axes of theshafts 33 and 63 are fixed and they lie one above the other, while theremote shaft 34 has its axis free to move in a vertical plane or up anddown.

The locomotive illustrated is of the battery type and thus energy foroperating the motor 58 is supplied by storage batteries. These storagebatteries are mounted in a battery box 69 (see Figs. 1 and 2) which ispreferably provided with four rollers 18-, there being two such rollerson each side and at the bottom thereof which provides for rolling thebattery box 69 on and off the horizontal portions of the aprons 28 and21. As is well known in battery type tramming locomotives it is commonpractice to roll the battery box off the main frame onto a chargingstand for periodic recharging of the batteries.

The battery box 69 is removably held on the main frame 2!! by lockingmechanism H (see Figs. 2 and 8) which involves a vertically removablebolt slidable through three perforated ears, two of which are carried bythe plate or apron 28 and one by the box 69.

Electric current is derived from the batteries in the box 69 by way of acable i2 (see Fig. 1) provided with a receiving socket 13 which fits ina receptacle 74 carried at the rear end of the battery box 89 andextending through an appropriate opening in the plate 28.

Adjacent its forward end the main frame 28 includes an extensibleoperators platform 15 in the form of an open topped box which may beadjusted longitudinally drawer-like with respect to the locomotive mainframe so as to reduce the overall length of the locomotive when it is tobe elevated or lowered by a hoist or elevator as illustrated in Fig. 2of the drawings. In normal operation this platform is extended asillustrated in Figs. 1 and 5 of the drawings. The platform 15 includes agenerally U-shaped frame 16, the front cross-member T! of which forms afront bumper and coupling device, the U-shaped frame 16 being formed ofintegral upright portions which form fully enclosing side walls of theplatform and top bent over inwardly extending steel members. Th bentover or horizontal flanges or wings on the spaced legs or sides of theU- shaped frame 16 extend rearwardly in the ways between the horizontalportions of the aprons 26 and 21 and the horizontal portions of theframe members 2| and 22, as clearly illustrated in Figs. 5 and 11 of thedrawings.

When the platform 15 is in its extended position, as illustrated inFigs. 1 and 5, the upper horizontal portion of the U-shaped frame 18overlaps the plates 2| and 22 approximately onethird of their length, asillustrated in Fig. 5 of the drawings. Anti-friction rollers 18 (seeFig. 6) are carried by and adjacent the front portions of the framemembers 2| and 22 and extend upwardly through apertures in the outwardlyextending flange portions thereof to support the rearwardly extendinghorizontal portions of the frame 76 which are preferably provided withangle wear and reinforcing strips 18.

As illustrated in Fig. 1 of the drawings, when the platform 75 iscompletely expanded the wheels 38 and 3| are directly exposed at theside of the truck frame, while said platform 15, when moved rearward orcontracted as illustrated in Fig. 2, overlaps the front wheels 30 alongthe upright portions of the frame 16.

Forwardly of each of the rollers 18 there is' also preferably provided aspring pressed locking mechanism which releasably locks the platform 75in its expanded position. The platform 15 also includes a pivoted bottomplate 8| which is pivotally attached to the frame 16 at its front by apivotal connection 82 so that the bottom plate 8| can swing upwardlyabout a horizontal axis at the front of the frame 16, thus providing forthe inward movement of the platform I5, as illustrated in Figs. 2 and 8of the drawings.

The bottom plate 8| is preferably provided at its rear end with aplurality of projecting lugs 83 adapted to be received in co-operatingholes in the cross-plate 24 whenthe platform 15 is extended. Thus thebottom plate 8| also acts to lock the platform 15 in its extendedposition when said bottom plate 8| is down forming the floor or bottomof the operators platform 15 because the bottom plate 8| in effect formsa hasp pivoted at its front end to the frame 16 and pinned by the lugs83 at the rear end to the main framev 20 through the cross member 28 ofthe latter.

Pivotally mounted on one front corner of the platform 15 is an operatorsseat 84 which is pivotally mounted on the cross-member 17 so as to swingupwardly about a horizontal axis to lie above the cross member 11 andadjacent the upright bottom member 8| when the platform 15 is pushedinwardly, as illustrated in Figs. 2 and 8 of the drawings. It is also tobe noted with reference to Fig. 8 that the pedal 81 is upright and liesbetween the end of the locomotive main frame 28 and the bumper andcoupling member 11 of the operators platform when the platform is pushedinwardly.

Manually operable brakes are provided for the locomotive which involveboth a foot pedal operating mechanism and an emergency hand operatingmechanism. The brake mechanism is such that a single adjustment providesfor adjustment of all four brake shoes and this adjustment is effectiveboth for the foot and hand operating devices.

Referring particularly to Figs. 3, 4 and 5 of the drawings it will beseen that the brake mechanism includes a pivoted, jointed brake lever 85which is pivotally mounted on a pin 88 carried by the housing oftransmission 68 and disposed adjacent the inside of side wall 22 of themain frame 20. At its forward end the lever 85 includes a foot lever orpad 81 which is pivoted to the main brake lever 85 on a horizontal axiswhich provides for its being swung upwardly, as clearly illustrated inFig. 8 of the drawings, to permit the maximum amount of inward movementof the platform 15. When the platform 15 is extended the foot lever orpad 8'! projects above the floor or bottom plate 8| thereof so as to beaccessible to the operator of the locomotive.

As best seen in Fig. 4 of the drawings, the brake lever 85 provided witha pair of short arms 88 which pivotally receive a turnbuckle link or rod89, the upper end of which is pivotally connected to an equalizingcross-head 90 (see Fig. 5), the opposite ends of which are pivotallyconnected to arms 9| and 92 keyed to torsion tubes 93 and 94,respectively, which, are loosely mounted on a assume:

7. shaft 95- which extends transversely across the main frame 20.

l The torsion. tubes; 9.3 and 94. are of. reduced. diameter. where theyextend: through collars welded. to.the upstanding; portions of aprons26. and 21, as clearly illustratedtinFig. 5 of the'drawings. Each ofsaid tubes 93and 94 has a downwardly extending arm keyedto its outerend; the.

arm carried by tube 94 being designated 96.

In Fig. 3 there is illustrated in detail the mechanism which extendsfrom the arm 96 tov apair of brake shoes 91 and 98. associated with thewheels 30 and 3| On one side of. the vehicle. A duplicate arrangement isprovided for operating similar brake shoes associated with wheels33..and 3| on theopposite side of. the truck which are actuated by anarm similar to arm 96 provided on the free or outer end of torsion tube9-3.

The arm 96 is pivotally connected to a link 9% which in turn ispivotally connected to a. lever I; the bottom of which is pivotallyattached to the crank arm [ill of brake shoe i which is pivotallyattached for swinging movement on a fixed, axis relative to the mainframe 23. A toggle link [92 is pivotally connected to an integral arm ofthe brake shoe 98 and to a point intermediate the ends of the lever lot.

In addition to the foot pedal operated lever 35, hand operated emergencybrake mechanism is provided for actuating the brakes which includes ashort integral arm I03- (see Fig. 4) formed on the brake lever 85 andhaving. the same effective length asthe arms88. An actuating rod ltd ispivotally connected to the arm 163 and extends forwardly, providing apivotal connection with a pivoted plate [05. through an elongated lostmotion slot I06.

Plate I05 is carried on a pivoted brake lever Hi1 which is provided withthe conventional actuating/and locking detent mechanism. The lost motionslot I06 provides forfree operation of the foot brake lever 86 withoutrequiring operation of the emergency brake lever I01. It is, of course,evident that manual actuation of either the brake or hand levers 85 orID! will actuate'th'e action of each pair of brake shoes on oneside ofthe vehicle will be obvious fronraconsiderationof the action which'takesplace when arm 96 swings counter-clockwise in" response to brakeactuation, as viewed in Fig.- 3' of the drawings. This counter-clockwisemovement will move the link 99 to the right which will swing the leverHill about its bottom pivot and thu increase the distance between thepivot points on the arms of brake shoes 9'1 and 98. This will swing thebrake shoes 91 and 93 about their fixed. pivotal axes, thus applying thebrakes, with the braking on the two equalized since each is workingagainst the other.

It is to be particularly noted that by virtue of the singleadjustmentprovided by the turnbuckle 89 it is possible to take up theslack'in the complete braking system for all four brake shoes andforboth the foot and hand brake 8 levers. The brakem'echariisml'abovedescribedis claimed in my Patent" No. 2,484,715, for Brake Mechanism forRail Cars, dated October 11, 1949.

It may also be mentioned that the locomotive is preferably provided withsanding apparatus including an. operating lever I09 (see Fig. 8) whichmay be actuated to rock a shaft H0 throughv a link Ill (see Fig. 5)which controls sanding mechanism between the two wheels 30 and 3! whichis generally of conventional construction.

From the above description it is obvious that I have produced acompacttramming locomotive or vehicle inwhich a simplified drive hasbeen provided from a driving motor to four driving wheels and whichincludes a pair of drive shafts the axes of which are mounted forrelative movement in that one of them is mounted for vertical or up anddown movement in a vertical plane relative to the mainframe, while theaxis of the other is held against movement relative to said" main frame.

Furthermore, I provide a telescoping type of operators platform whichmaybe expanded when the machine is in operation and which may be pressedor slid inwardly by rectilinear movement in a drawer-like fashion whenthe effective or overall length of the locomotive is to be reduced as,for example, when it is to be placed on a hoist or elevator.

Obviously those skilled in the art may make various changes in thedetails and arrangement of parts without departing from the spirit andscope of the invention as defined by the claims hereto appended, and Itherefore wish not to berestricted to the precise constructionhereindisclosed.

Having thus described and shown an embodiment of my invention, what Idesire to secure by Letters-Patent of the United States is:

l. A tramming locomotive including a main frame, power driven tractionmeans therefor, an

operators platform at one end of said main frame, means providing forslidable adjustment .of said operators platform to reduce the effectivelength of said locomotive, and operating mechanism for said locomotiveincluding an operating lever extending from said main frame to saidoperators platform, said operating lever including arear portion whichmay be swung upwardly to provide for maximum adjustment of saidoperators platform as aforesaid.

2. A tramming locomotive including a main frame, power driven tractionmeans therefor, an operators platform at one end of said main frame,means providing for adjustment of said operator platform to reducetheeffective length of said locomotive, and operating mechanism for saidlocomotive including an operating lever ex tending from said mainframeto said operators" platform, said operating lever including a rearportion which maybe adjusted to provide for maximum adjustment of saidoperators platform as aforesaid.

3. A tramming locomotive including a main frame, operatons platformincluding a floor at one end of, said main frame, means providing foring arear" portion which maybe swung upward- 1y to provide for maximuminward sliding adjustment of said operators platform as aforesaid.

4. A tramming locomotive including a main frame, power driven tractionmeans therefor, an operators platform at one end of said main frame,means providing for slidable adjustment of said operators platform toreduce the effective length of said locomotive, and brake operatingmechanism for said locomotive including a pivoted, jointed operatinglever projecting from said main frame to said operators platform, saidjointed operating lever including a rear portion which may be swungupwardly to provide for maximum inward sliding adjustment of saidoperators platform as aforesaid.

5. An elongatable locomotive having a main frame, a generally U-shapedframe telescopically carried by said main frame, said U-shaped frameincluding spaced leg portions adapted to telescope with said main frameand an end portion, said portions forming when said locomotive iselongatedsubstantially fully enclosing side walls of an open topoperators platform, a movable bottom plate for said operators platformadapted to lie in a generally horizontal position between saidlocomotive main frame and the walls of said U-shaped frame to form thebottom of said operators platform and movable to occupy a generallyupright position adiacent said main frame and between it and the endportion of said U-shaped frame when said frames are telescoped, anoperators seat, means pivota ly attaching said operators seat to the endportion of said U-shaped frame, operating mechanism for said locomotiveincluding an operating lever, means pivotally attaching said operatinglever to said main frame, a pedal, and means pivotallv connecting saidoperating lever and said pedal whereby said p dal is movable from agenerally horizontal pos tion in which it projects into said operatorsplatform above said movable bottom plate when said locomotive iselongated to a generally upright position whereby said frames may betelescop d inwardly a maximum amount, said pedal occupying a positionadjacent said main frame and between it and said generally uprightbottom plate and said seat being swung to an upright position above theend portion of the U-shaped frame and adjacent said generally uprightbottom plate when said frames are telescoped.

6; An elongatable locomotive having a main frame, a genera ly U-shapedframe telescopically carried by said main frame, said U-shaped frameincluding spaced leg portions adapted to telescope with said main frameand an end portion, said portions forming when said locomotive iselongated substantially fully enclosing side walls of an open topoperators platform, a movable bottom plate for said operators platformdapted to lie in a generally horizontal position between said locomotivemain frame and the walls of said U-shaped frame to form the bottom ofsaid operators platform and movable to occupy generally upright positionadjacent said main frame and between it and the end portion ofsaid U-shaped frame when said frames are telescoped, operating mechan sm forsaid locomotive including an operating lever, means pivota ly attachingsaid operating lever to said main frame, a

pedal, and means pivotally connecting said op' erating lever and saidpedal whereby said pedal is movable from a generally horizontal posit onin which it projects into said operators platform above said movablebottom plate when said locomotive is elongated to a generally uprightposi tion whereby said frames may be tele'scoped inwardly a, maximumamount, said pedal occupying a position adjacent said main frame andbetween it and said generally upright bottom plate when said frames aretelescoped.

7. An elongatable locomotive having a main frame, a generally U-shapedframe telescopically carried by said main frame, said U-shaped frameincluding spaced leg portions adapted to telescope with said main frameand an end portion, said portions forming when said locomotive iselongated substantially fully enclosing side walls of an open topoperators platform, a movable bottom plate for said operators platformadapted to lie in a generally horizontal position between saidlocomotive main frame and the walls of said U-shaped frame to form thebottom of said operators platform and movable to occupy a generallyupright position adjacent said main frame and between it and the endportion of said- U-shaped frame when said frames are telescoped, anoperators seat, and means pivotally attaching said operators seat to theend portion of said U-shaped frame, said seat being swingable to anupright position above said end portion whereby it lies adjacent saidupright bottom plate when said frames are telescoped.

8. A tramming locomotive including a main frame having a pair oflaterally spaced longitudinally extending side members, each including alower side member and an upper Z-shaped apron, said lower side memberhaving a top outwardly extending flange, a cross-piece rigidlyconnecting said lower side members and forming a bumper and couplingmember for the locomotive at the rear end thereof, forward and rearwardcross-plates interconnecting said lower spaced side members adjacenttheir bottoms and forward and rearward ends, said Z-shaped main frameaprons being above said lower side frame members and each having anoutwardly extending bottom portion spaced above the outwardly extendingtop flange of the lower side member to form two ways, one way extendinglongitudinally along each side of said main frame, an extensibleoperators platform which may be adjusted longitudinally drawer-like soas to reduce the overall length of the locomotive when it is to bereceived by a hoist, said operators platform including a generallyU-shaped frame having spaced leg portions and an end portioninterconnecting them and forming a front bumper and coupling device forthe locomotive, said U-shaped frame being integral and formed of uprightside and inwardly extending bent over top portions, said bent over topportion of said spaced legs extending rearwardly into said ways andalong the side of said main frame, anti-friction roller means adjacentthe front of each of said lower spaced main frame sde members extendingthrough an aperture in the outwardly extending flange thereof andcarrying the top bent over portion of the leg of said U-shaped framethereabove, a spring pressed locking mechanism forward of eachanti-friction roller means for releasably locking the platform in itsexpanded position, a bottom plate adapted to form the floor of sa dplatform, means pivotally attaching the front end of said bottom plateto the end portion of the U-shaped frame and adjacent its bottom toswing upwardly about a horizontal axis whereby said platform may beadjusted longitudinally inwardly when said bottom plate is swungupwardly, said bottom plate being provided at its rearward end, with aplurality of downwardly extending lugs adapted to be received in holesin the bottom front cross-plate of said main frame when said bottommember is forming the floor of said platform whereby said bottom platealso acts'to lock the platform in its expanded position, an operatorsseat, and means pivotally attaching said operators seat to the top ofthe end portion of said U-shaped frameto swing upwardly about ahorizontal axis and to lie adjacent the upwardly extending platform:bottom plate when the platform is adjusted inwardly as aforesaid.

9. A tramming locomotive including a main frame having a. pair oflaterally spaced longitudinally extending side members each having meansforming adjacent spaced upper and lower longitudinally and outwardlyextending flanges, a, cross-piece rigidly connecting said spaced sidemain frame members and forming a bumper and coupling member for thelocomotive at the rear end thereof, a cross-plate rigidlyinterconnecting saidspaced main frame side members adjacent their frontends and bottoms, an extensible operators platform which maybe adjustedlongitudinally drawer-like with respect to said main frame so as toreduce the overall length of the locomotive, said-operators platformincluding a generally U-shaped frame having spaced leg portions and anend portion interconnecting them and forming a front bumper and couplingdevice for the locomotive, said U-shaped frame being integral and formedof upright side and inwardly extending bent over top portions theupright portions of which form substantially solid upright enclosingside walls of the platform, the top portions of said spaced legsextending rearwardly between said spaced upper and lower longitudinallyand outwardly extending flanges of said main frame side members,anti-friction roller means carried adjacent the front of each of saidspaced main frame side members extending upwardly through an aperture inthe lower outwardly extending flange thereof and carrying an inwardlyextending top portion of one of said legs thereabove, a spring pressedlocking mechanism forward of each anti-friction roller means forreleasably locking the platform in its expanded position, a bottom plateadapted to form the floor of said platform, means pivotally attachingthe front end of said bottom plate to the end portion of the U-shapedframe and adjacent its bottom to swing upwardlyabouta horizontal axiswhereby said platform may be adjusted longitudinally inwardly when saidbottom plate is swung upwardly, said bottom plate being provided at itsrearward end with a plurality of r downwardly extending lugs adapted tobe received in holes in the bottom cross-plate of said main frame whensaid platform bottom plate is forming the floor of said platform wherebysaid platform bottom plate also acts to lock the plat- N form in itsexpanded position, an operators seat, and means pivotally attaching saidoperators seat to the top of the end portion of said U- shaped frame toswing upwardly about a horilongitudinally and outwardly extendingflanges,

an extensible operators platform which may be adjusted longitudinallydrawer-like with r pect to said main frame so as to reduce t e overalllength of the locomotive, said operators platform including a, generallyU-shaped frame having spaced leg portions and an end portioninterconnecting them and forming a front bumper and coupling device forthe locomotive, said U-shaped frame being integral and formed of uprightsideand inwardly extending bent over top portions the upright portionsof which form substantially solid upright enclosing side walls of theplatform, the top portions of said-spaced legs extending rearwardlybetween said spaced upper and lower longitudinally and outwardlyextending flange members of said main frame side members, ananti-friction roller means carried adjacent the front of each of saidspaced main frame side members and extending 'upwardly through anaperture in the front of the lower outwardly extending flange thereofand carrying an inwardly extending top portion of one of said U-shapedlegs thereabove, a spring pressed locking mechanism forward of eachantifriction roller means for 'releasably locking the platform in itsexpanded posit on, a bottom plate adapted to form the floor of saidplatform, means pivotally attaching the front end of said bottom plateto the end portion of the U-shaped frame and adjacent its bottom toswing upwardly about a horizontal axis whereby said platform may beadjusted longitudinally inwardly when said platform bottom plate isswung upwardly, an operators seat, and means pivotally attaching saidoperators seat to the top of the end portion of said U-shaped frame toswing upwardly about a horizontal axis and to lie adjacent the upwardlyextending platform bottom plate when said platform is adjusted inwardlyas aforesaid.

ll. A tramming locomotive including a main frame having a pair oflaterally spaced longitudinally extending side members each having meansforming adjacent spaced upper and lower flanges extending sidewardlytherefrom, an extensible operators platformwhich may be adjustedlongitudinally drawer-lilac with respect to said main frame so as toreduce the overall length of the locomotive, said operators platformincluding a generally U-shaped frame having spaced leg portions and anend portion interconnecting them and forming a front bumper and couplingdevice for the locomotive, said U-shaped frame being integral and formedof upright and bent over top portions the upright portions of which formsolid enclosing side walls of the operators platform, the bent over topportions of said spaced legs extending rearwardly between said spacedupper and lower flanges of said main frame, an anti-friction rollermeans carried adjacent the front of each of said spaced main frame sidemembers and extending upwardly through an aperture in and adjacent thefront of the lower flange thereof and carrying a top portion of one ofsaid U-shaped frame legs thereabove, locking mechanism associated withsaid main frame for releasably locking the platform-in its expandedposition, a bottom plate adapted to form the floor of said platform,means pivotally attaching the front end of said bottom plate to the endportion of the U-shaped frame and adjacent its bottom to swing upwardlyabout a horizontal axis whereby said platform may be adjustedlongitudinally inwardly when said bottom plate is swung upwardly, anoperators seat, and means pivotally attaching said operators seat to the'top of the end portion of said U-shaped frame to swing upwardly about ahorizontal axis and to lie adjacent the upwardly extending platformbottom plate when said form is adjusted inwardly as aforesaid.

12. A tramming locomotive including a main frame having a pair oflaterally spaced longitudi-. nally extending side members each havingmeans forming adjacent spaced upper and lower flanges extendingsidewardly therefrom, an extensible operators platform which may beadjusted longitudinally drawer-like with respect to said main frame soas to reduce the overall length of the locomotive, said operatorsplatform including a generally U-shaped frame having spaced leg portionsand an end portion interconnecting them and forming a front bumper andcoupling device for the locomotive, said U-shaped frame being integraland formed of upright and bent over top portions the upright portions ofwhich form solid enclosing side walls of the platform, the top portionsof said spaced legs extending rearwardly between said spaced upper andlower flanges of said main frame, an anti-friction roller means carriedadjacent the front of each of said spaced main frame side members andextending upwardly through an aperture in and adjacent the front of thelower flange thereof and carrying a top portion of one of said U-shapedframe legs thereabove, locking mechanism associated with said main framefor releasably locking the platform in its expanded position, a bottomplate adapted to form the floor of said platform, and means pivotallyattaching the front end of said bottom plate to the end portion of theU-shaped frame and adjacent its bottom to swing upwardly about ahorizontal axis whereby said platform may be adjusted longitudinallyinwardly when said bottom plate is swung upwardly.

13. A tramming locomotive including a main frame having a pair oflaterally spaced longitudinally extending side members each having meansforming adjacent spaced upper and lower flanges extending sidewardlytherefrom, an extensible operators platform which may be adjustedlongitudinally drawer-like with respect to said main frame so as toreduce the overall length of the locomotive, said operators platformincluding a generally U-shaped frame having spaced leg portions and anend portion interconnecting them and forming a front bumper and couplingdevice for the locomotive, said U-shaped frame being integral and formedof upright and bent over top portions the upright portions of which formsolid enclosing side walls of the platform, the top portions of saidspaced legs extending rearwardly between said spaced upper platand lowerflanges of said main frame, an antifriction roller means carriedadjacent the front of each of said spaced main frame side members andextending upwardly through an aperture in and adjacent the front of thelower flange thereof and carrying a top portion of one of said U- shapedframe legs thereabove, looking mechanism associated with said main framefor releasably locking the platform in its expanded position, a bottomplate adapted to form the floor of said platform, and means pivotallymounting said bottom plate to swing upwardly about a horizontal axisextending transversely of said locomotive frame whereby said platformmay be adjusted longitudinally inwardly when said bottom plate is swungupwardly.

14. A tramming locomotive including a main frame having a pair oflaterally spaced longitudinally extending side members each having meansforming adjacent spaced upper and lower flanges extending sidewardlytherefrom, an extensible operators platform which may be adjustedlongitudinally drawer-like with respect to said main frame so as toreduce the overall length of the locomotive, said operators platformincluding a generally U-shaped frame having spaced leg portions and anend portion interconnecting them and forming a front bumper and couplingdevice for the locomotive, said U-shaped frame being integral and formedof upright and bent over top portions the upright portions of which formsolid enclosing side walls of the platform, the top portions of saidspaced legs extending rearwardly between said spaced upper and lowerflanges of said main frame, locking mechanism associated with said mainframe for releasably locking the platform in its expanded position, abottom plate adapted to form the floor of said platform, and meanspivotally mounting said bottom plate to swing upwardly about ahorizontal axis extending transversely of said locomotive frame wherebysaid platform may be adjusted longitudinally inwardly when said bottomplate is swung upwardly.

15. A tramming locomotive including a main frame having a pair oflaterally spaced longitudinally extending side members, an extensibleoperators platform which may be adjusted longitudinally drawer-like withrespect to said main frame so as to reduce the overall length of thelocomotive, said operator's platform including an integral generallyU-shaped frame having spaced leg portions and an end portioninterconnecting them and forming a front bumper and coupling device forthe locomotive, said spaced leg portions constituting solid uprightenclosing side walls of the platform, said operato'rs platform alsoincluding a bottom plate adapted to form the floor of said platform, andmeans pivotally mounting said bottom plate to swing upwardly about ahorizontal axis extending transversely of said locomotive frame wherebysaid platform may be adjusted longitudinally inwardly when said bottomplate is swung upwardly.

ARTHUR L. LEE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 732,847 Grant July 7, 1903986,981 Hern et al Mar. 14, 1911 1,002,433 Oliver et a1 Sept. 5, 19111,410,596 Pray Mar. 28, 1922 1,583,241 Arnold May 4, 1926 1,926,966Biederman et a1. Sept. 12, 1933 2,142,622 Watt Jan. 3, 1939 2,323,913Johnson July 13, 1943

